摘要:
A method for forming an optical component includes (i) depositing optical layers on a base, and (ii) controlling a thickness of a tuning layer by (a) depositing the tuning layer on the optical layers, (b) measuring a first optical characteristic, (c) measuring a second optical characteristic after continued deposition of the tuning layer, (d) determining whether the second optical characteristic has decreased compared to the first optical characteristic, (e) when the second optical characteristic has not decreased, continuing deposition of the tuning layer and returning to steps (ii)(b)-(e), when the second optical characteristic has decreased, terminating the depositing and removing a portion of the tuning layer formed during a period of time defined from when an increase/decrease of the second optical characteristic is stopped to when the second optical characteristic is changed to be decreased, and (f) adding a layer of a lower refractive index on the tuning layer.
摘要:
An imaging device includes a micro lens that collects light from a subject, a light sensing element that generates a signal for performing focusing determination through phase difference detection by sensing subject light collected by the micro lens, and a light blocking portion that is disposed between the micro lens and the light sensing element and performs pupil division for the subject light by blocking a part of the subject light, wherein the light blocking portion is set such that a position of an image forming point of subject light passing through the micro lens and a position of an end portion of the light blocking portion on an entrance side become distant from each other according to a variation in image height.
摘要:
An imaging device includes a micro lens that collects light from a subject, a light sensing element that generates a signal for performing focusing determination through phase difference detection by sensing subject light collected by the micro lens, and a light blocking portion that is disposed between the micro lens and the light sensing element and performs pupil division for the subject light by blocking a part of the subject light, wherein the light blocking portion is set such that a position of an image forming point of subject light passing through the micro lens and a position of an end portion of the light blocking portion on an entrance side become distant from each other according to a variation in image height.
摘要:
An image pickup element includes a light receiver having a matrix arrangement formed by disposing first-direction arrays, each having photoelectric converters arranged in a first direction with a gap therebetween, in a second direction orthogonal thereto, and micro-lenses above the light receiver. In the matrix arrangement, a certain first-direction array has two first photoelectric converters receiving, via two micro-lenses, photographic-subject light passing through two segmental regions in an exit pupil of a photographic optical system, and a certain second-direction array has two second photoelectric converters receiving photographic-subject light passing through two segmental regions in the exit pupil. Light axes of the two micro-lenses extend through vicinities of edges, farthest from each other in the first direction, of the first photoelectric converters. The first photoelectric converters include two photoelectric converters that flank one photoelectric converter, disposed at an intersection between the certain first-direction and second-direction arrays, in the certain first-direction array.
摘要:
An image pickup apparatus includes a light-beam splitting mirror configured to transmit and reflect incident light that has entered the light-beam splitting mirror through a photographing optical system; an image sensor that receives light transmitted through the light-beam splitting mirror; an autofocus detecting unit that receives light reflected by the light-beam splitting mirror; a signal processing unit configured to process an image pickup signal of the image sensor; and a display unit configured to display an image being photographed, on the basis of an image signal obtained at the signal processing unit. In the image pickup apparatus, the light-beam splitting mirror has spectral characteristics including a reflectivity of 25% or more and 35% or less at a wavelength of 400 to 650 nm and a reflectivity of 60% or more at a wavelength of about 700 nm through optimization.
摘要:
The invention provides a projection screen, wherein clear images can be obtained without being influenced by projection environments, the flexibility can be obtained, and its manufacturing cost can be reduced and its manufacturing method. An optical multilayer film is formed on a transparent substrate by alternately layering metal films and dielectric films by using spattering. This multilayer film has the high reflection characteristics in relation to three primary colors wavelength bands lights, and has the high absorption characteristics in relation to lights other than the three primary colors wavelength bands lights. Therefore, the white level and the black level of images can be raised. Further, in terms of the optical multilayer film, as the film thickness dependence of the reflectance change becomes smaller and the incidence angle dependence of reflectance change becomes smaller, a wide visual field angle can be obtained.
摘要:
A clear image unaffected by the brightness of the projection environment. The projection screen according to the present invention is a projection screen for projecting thereupon narrow-band tricolor wavelength band light to display an image, and comprises an optical thin film (3) which has high reflection properties regarding the narrow-band tricolor wavelength band light, and has high transmission properties regarding at least visible wavelength band light other than the wavelength band light, on a screen base (2). With the projection screen according to the present invention configured as above, the optical thin film (3) serves as a so-called band filter. That is to say, the optical thin film (3) particularly reflects narrow-band tricolor wavelength band light and transmits light of other wavelengths, thereby functioning as a narrow-band tricolor wavelength bandwidth filter acting to separate these.
摘要:
There is provided a screen, which, with a simple configuration, is capable of effectively utilizing light projected thereon and realizing an even luminance distribution on the screen. This screen has a diffusion layer whose diffusion characteristic expressed as a luminance distribution with respect to a scattering angle of incident light incident at an angle of 0° is varied such that the peak position of the luminance distribution is shifted towards a greater value of scattering angle in the direction of the central portion of the screen the greater the distance from the central portion of the screen is. The present invention also provides an optical film suitable for use in such a screen, and a manufacturing method therefor.
摘要:
A reflective screen is provided. A reflective screen that displays an image by reflecting light from a light source includes a reflective sheet, a light-scattering sheet, and an adhesive layer bonding the reflective sheet to the light-scattering sheet. The adhesive layer contains a coloring material that absorbs light in a particular wavelength region.
摘要:
There is provided a screen, which, with a simple configuration, is capable of effectively utilizing light projected thereon and realizing an even luminance distribution on the screen. This screen has a diffusion layer whose diffusion characteristic expressed as a luminance distribution with respect to a scattering angle of incident light incident at an angle of 0° is varied such that the peak position of the luminance distribution is shifted towards a greater value of scattering angle in the direction of the central portion of the screen the greater the distance from the central portion of the screen is. The present invention also provides an optical film suitable for use in such a screen, and a manufacturing method therefor.